A Gain Reconfigurable CMOS Wideband LNA for Sub-7GHz 5G NR Receiver
SriHarsha Vardhan G., Deepali Pathak, Ashudeb Dutta
Abstract
This brief presents a bandwidth enhancement and gain flatness technique based wideband CMOS low noise amplifier for 5G NR receivers. Wide bandwidth, low noise figure, reconfigurable gain flatness is achieved by using 2-stage common source resistive feedback shunt and series inductive peaking technique respectively. The proposed reconfigurable low noise amplifier achieves gain and noise figure of 25 dB and 2 dB at high gain mode and 15 dB and 3.8 dB at low gain mode respectively. The circuit has a gain control feature to accommodate various input power levels. The designed methodology proves to get wider 3dB bandwidth from 2.5 GHz to 6.5 GHz. The design draws 10.40 mA current (without buffer) from 1.2V supply with a core silicon area of <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$0.35 mm^{2}$ </tex-math></inline-formula> .